Rotary engine.



J. JOHNSON.

BOTABYENGINE.

11 21110111011 mum 1330.17, 1912.

1,066,413. Patented July 1, 1913.

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ROTARY ENGINE, APPLICATION FILED mm. m, 1912.

Patented July 1, 1913.

2 SEEBTHHEBT 2.

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I] 6 [I I l I /9 10 I 5 3' E 3 6.v /a' I E if i 3 7 a & m1 N :fl Q aviuunto'z Quartzsite, in the county of Yuma and State the rotor and the stationary casing, surcombination and arrangement of parts,as

JOSEPIZEOHMON, OF QUARTZSITE, ARIZONA.

ROTARY ENGINE.

Specification of Letters Patent.

Patented July 1 l 913 Application filed December 17, 1912. Serial No. 737,255.

T 0 all whom, it may concern:

Be it known that I, Josnrn Jo nson, a citizen of the United States, residing at of Arizona, have invented'new and useful Improvements in Rotary Engines, of which the following is a specification.

This invention relates to rotary engines, the object of the invention being to provide a compact and etlicient rotary engine which is operated by the expansion of steam admitted to an annular steam space between rounding the same, the steam expanding between lugs or projections on the peripherof the rotor and displaceable cut-0112i mounted in the casing and normally held yieldingly against the periphery of the rotor, the cut-offs and the inlet and exhaust ports being so arranged with relation to each other andthe lugs on the rotor that back pressure on the rotor is overcome.

A further object of the invention is to. provide check orh'i'elief valves in connection with thelugs on the rotor to further assist in relieving back pressure and to enable Said lugs to force their way through any live steam with which they may come in contact, during the time they are ,passing' by the cut.- ofi'sor moving in the vicinity thereof.

With .the above and other objects in view, the invention consists in the construction,

will be hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claims hereunto ap pended.

1n the drawings: l igure 1 is a sideelevation of a rotary engine, embodying the present invent-ion. Fig. 9. is a vertical longitudinal section through'tho same taken at right angles to the rotor shaft. Fig. 3 is a vertical diametrical section through the engine. Fig. 4 is a detail. cross section on an enlarged scale on the line 4-'t of Fig. 2. Fig. 5 is a detail cross section on the line 55 of Fig. 2. p

The engine contemplated in this inven: tion comprises a suitable base or bed 1, upon which the stationary cylindrical casing 9. is mounted, said casing being shown as supported by upwardly converging braces or legs 3 which are bolted, at 4, to the outer annular or cylindrical wall of the casing 2.

The casing 2 is closed at its opposite sides by disk shaped heads 5, which may carry suitable bearings'for the centrally located shaft 6, on which. the rotor, hereinafter'described, is mounted. These-side pla'tes or heads are fastened by means of bolts 7 to the peripheral Wall of the casing in such men ner as'to make the casing as a whole steam tight. Steam is admitted to the interior of the cylindrical casingthrough an inlet-port 8 and passes outwardly through an exhaust port 9, the ports 8 and 9 extending through the outer peripheral wall of the casing and being shown preferably 'us extending radially with respect to the shaft 6, although this is notessential. 1

The inlet and exhaust portsB and '9 are arranged in spaced relation to each other or at'a suitable distance apart, as shown in Fig. 2, while between said inlet and exhaust ports, there are arranged two spring-pressed cut-oils 10 and 11. These cut-oils 10 and 11 work in r:-:esses 12 and'1'3 in the casing 2,

and are yieldingly urged inwardly by means.

of expansion spr ngs 14 and 15 arranged in thefrecesses behind the cut-offs 10 and 11, as illustrated, said springs causing the inner edges of the cut-offs to ride against the outer periphery of the rotor 16 which is provided with 'a hub 17 fast on the shaft 6, the hub :and rim or body portion of the rotor being secured together in rigid relation by means of spokes 18, or the equivalent thereof. The rotor 16 is provided on its outer periphery with lugs 19, two of such-lugs being shown and arranged at diametrically opposite points Each of said lugs comprises an abrupt faceQO extending radially with respect to the. shaft 6, and an inclined or beveled face 21, which is designed to act against the inner edges of the cut-offs 10 and 11, which may be also correspondingly beveled,

as shown, in order to lift or move said cutoil's outwardly, and enable the lugs 19 to pass by the same. As so n as each lug passes by either cut-oft. said cut-oil is im mediately returned into contact with the periphery of the rotor by means of the ex pansion spring lying behind the same. Between the two cutoffs 10 and 11, the casing is provided with a bv-pass 22, shown as consisting hf a groove forming an enlargement of the steam space between the two cut-offs. This allows ample space for steam that is caught between the two cut-oils and permits the lugs 19 to pass along such portion of the space between the casing and rotor, without serious back pressure, which would otherwise result were the live steam admitted freely to said space. In order to still furthcr'guard against the absorption of power by the lugs 19 having' to force their way through live steam, before. reai3hing the inlet port .8, each of said lugsis provrdea with a" checltvalve or back pressure relief -valve 23,- the' same, belng held 'nqrmally closed by mcansof avalve cldsing-spring24.

' andll a'nd the back-ingsprings therefor, a

section ct the-cylindrical casing may be made detachable, as shown in IhgzfQ, said detachable section closing the outer ends of "-the recesses 12 and 13, and being'held in fasten tlie'side walls or heads-of'the casing to the cylindrical wall thereof;

It will he understood that the" number of lugs Itlfimay be varied,--'ac cording to'the will of the manufacturer-{and as may befound expedient in accordance. with the use to which the cngine'is tobe put. It' will also "be apparent that thejldistance between the inlet; and exhaust ports, and also. the distance between the primary: andsecondary.

cut-offs may falso- -b'e varied, in accordance. withwhat is found'to be the-best in prae 40 tic e It will be pnderstood that the primary cut-off 10 serves as a backstop or the'exhaust steam at one side of the casing, while the cut-ofl" ll'serves as a stop for vthe live steam jpands between sai'd'stopand the lug 1'951 t-he opposite side of the inlet port 8. v i

\Vha-t'is claimed is:

1} In a rotary engine, a cylindrical casing provided with irileta'nd exhaust ports in the ,peripheral wall thereof and spaced; apart, a cylindrical rotor concentric with the casing-lugs projecting from the periphery of the rotor and working in contact/with the casin, r,cl1eck valves .inrsaid lugs, and

sliding cut-offs mounted in "the casing and normally bearing against: the peripheryrzof the rotor, said cut-offsv being spaced apart and exhaust ports.

and located between the inlet and exhaust 4 ports. I

2. In a rotary engine, "acylindrical casing providedwithinlet and exhaust ports in the peripheral wall thereof and spaced apart, a cylindrical rotor concentric with the casing, lugs projecting .from the ,periphery of the rotor and Working in contact with the casing, back! pressure relief valves, and sliding cut-offs mounted in the casing and normally bearing against the periphery of the rotor, said. cut-offs being spaced apart and located between the'linlet 3Q In a rotary engine, a cylindrical casing provided with inlet and exhaust ports in the peripheral wall thereof and spaced apart, a cylindrical rotor concentric with the casing,-lugs projecting from theperiphery of the rotor and working in contact with the casing and formed with beveled inter, said Cut-0E5. being spaced apart and located between t-heinlet and 'exhau'st'ports. place by, one or more of the bolts 7 which 4. In a rotary-engine, a cylindrical casing provided with inlet and exhaust'ports in the peripheral \valll thereofxa'ndsp'aced apart, a cylindrical roton concentric with the casing,lugs projecting frornthe'periphery of ,therbtoi and: wo'rkin'g in contact with the casing, and spring [pressed sliding cut-oliswmounted in the-casing and normally. bearing against the periphery of the rotor, said cut-oilsbeingv spaced apart a and located between the inlet/and exhaust ports.

5.1In a rotary engine, a cylindrical cas ing provided with inlet and exhaust ports in the peripheral'wall thereof and spaced apart, a cylindrical rotor concentric with the casing, lugs projectingiromflthe periphery of the rotor and working in contact with the casing, and sliding cut-offs mounted in the casing and normally bearing against the periphery of the'r0tor, said cut-Otis being spaced apart and located'be-. tween the inlet and exhaust ports, the casing being provided with a by-pass extending longitudinally thereofbetween the cut-05s.,

In testimony whereof I afiix my sigmature in presence of twowitnesses,

v ,JosEPH JOHNSON;

Witnesses: w

WM. B. HILL, H. Srmnnran. 

